He has a lot of videos focused on home appliances. Some that come to mind are toasters, dishwashers, heat pumps, and an entire series on Christmas lights. Breaks everything down with lots of tips for better home use (because no one reads the manuals on thise things).

If you ever wanted to learn about latent heat of transformation, your cup runneth over.

Lots of great stuff, lots of retro tech and common how it works stuff. His dishwasher video makes it so there is no reason to wash things by hand pretty much ever.

He hasn't done any videos on computers, AFAIK. His channel covers a wide range of topics, from washing machines, car blinkers, heaters, refrigerators, to christmas lights. You can see his backlog here.

He does more old tech stuff or explains how appliances work. Not really computers. 10/10 channel but I get that the content isn't super captivating for everyone.

I highly recommend the series on the CED and the downfall of RCA. He's also got a number of videos about various cameras which are also great!